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Theory of Machine

Theory of Machine
Elements of pairs held together mechanically is known as

Open pair
Mechanical pair
Closed pair
Rolling pair

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Theory of Machine
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that

Both governors A and B are equally sensitive
Governor B is more sensitive than governor A
None of these
Governor A is more sensitive than governor B

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Theory of Machine
The two elements of a pair are said to form a _________ when they permit relative motion between them.

Kinematic pair
Sliding pair
Open pair
None of these

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Theory of Machine
When the particles of a body moves perpendicular to its axis, then the body is said to have

Torsional vibration
Longitudinal vibration
Transverse vibration
None of these

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Theory of Machine
The mechanism in which two are turning pairs and two are sliding pairs, is called a

Scotch yoke mechanism
All of these
Double slider crank chain
Elliptical trammel

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Theory of Machine
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by

ω². (r₁ + r₂). (1 + cos² θ)
ω². (r₁ - r₂). (1 - sin² θ)
ω². (r₁ + r₂). [(2 - cos² θ)/cos³ θ]
ω². (r₁ r₂). (1 - cos² θ)

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